old lua test stuff by hawkear removed or commented

new function: Party.SetWinner sets winner of current round
new unit ULuaUtils w/ some functions that are or may become useful
moved Lua_ClearStack and Lua_ToBinInt to ULuaUtils
added first hooks (have a look at hooks.txt in game/plugins until documentation is finished)
lua module for TextGl written and finished
lua testfile (game/scripts/main.lua) ported to new interface, see game/plugins/LuaTest.usdx



git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/branches/experimental@1709 b956fd51-792f-4845-bead-9b4dfca2ff2c

11 files changed, 357 insertions, 85 deletions

diff --git a/Lua/game/plugins/LuaTest.usdx b/Lua/game/plugins/LuaTest.usdx
new file mode 100644
index 00000000..4cfd718f
--- /dev/null
+++ b/Lua/game/plugins/LuaTest.usdx
@@ -0,0 +1,63 @@
+function plugin_init()

+  register('lua interface test plugin', 'not Versioned', 'Hawkear');

+

+  require('Usdx.Gl');

+  require('Usdx.TextGl');

+

+  Usdx.Hook('Display.Draw', 'OnDraw');

+

+  return true

+end

+

+function OnDraw()

+  -- Calculate FPS

+  FPScounter = 1 + (FPScounter or 0) -- increment FPScounter (which is nil, when undefined, therefore "or 0")

+  if Usdx.Time() > (LastTime or 0) then

+    LastTime = Usdx.Time() + 1000

+

+    print("FPS:    " .. FPScounter - (LastFPScounter or 0)) -- print is only displayed, if compiled with DEBUG

+    LastFPSCounted = FPScounter - (LastFPScounter or 0)

+

+    LastFPScounter = FPScounter

+

+    -- Show the first 200 Textures

+    TexNum = 1 + (TexNum or 0)

+    if TexNum > 200 then TexNum = 1 end

+    print("TexNum: " .. (TexNum or 0))

+  end

+

+  -- draw fps to top right corner

+  TextGl.Style(0)

+  TextGl.Pos(650, 36)

+  TextGl.Size(30)

+  TextGl.Italic(False)

+  Gl.Color(0.9, 0.9, 0.9, 0.7)

+  TextGl.Print('FPS: ' .. LastFPSCounted)

+

+  -- Draw some rectanGles

+  Gl.Enable("Gl_BLEND")

+  Gl.Color(1, 1, 1, 0.5)

+  for i = 1,10 do

+    Gl.Begin("Gl_LINE_loop")

+    Gl.Vertex(0+4*i, 0+4*i);

+    Gl.Vertex(0+4*i, 600-4*i);

+    Gl.Vertex(800-4*i, 600-4*i);

+    Gl.Vertex(800-4*i, 0+4*i);

+    Gl.End()

+  end

+  Gl.Disable("Gl_BLEND")

+

+  -- Display a Texture

+  Gl.Enable("Gl_BLEND")

+  Gl.Enable("Gl_TEXTURE_2D")

+  Gl.Color(1, 1, 1, 1)

+  Gl.BindTexture("Gl_TEXTURE_2D", TexNum or 0)

+  Gl.Begin("Gl_QUADS")

+    Gl.TexCoord(0, 0); Gl.Vertex(10,  10);

+    Gl.TexCoord(0, 1); Gl.Vertex(10,  110);

+    Gl.TexCoord(1, 1); Gl.Vertex(110, 110);

+    Gl.TexCoord(1, 0); Gl.Vertex(110, 10);

+  Gl.End()

+  Gl.Disable("Gl_TEXTURE_2D")

+  Gl.Disable("Gl_BLEND")

+end
\ No newline at end of file
diff --git a/Lua/game/plugins/hooks.txt b/Lua/game/plugins/hooks.txt
new file mode 100644
index 00000000..a30bdc62
--- /dev/null
+++ b/Lua/game/plugins/hooks.txt
@@ -0,0 +1,4 @@
+this document lists all hooks that are available and created by usdx

+Usdx.LoadingFinished - called when all plugins are loaded, not breakable

+Display.PreDraw - called before a frame is Drawn - not breakable

+Display.Draw - called after a frame w/ screen is drawn. you can draw above screen here
\ No newline at end of file
diff --git a/Lua/src/base/UMain.pas b/Lua/src/base/UMain.pas
index 57ad01a1..a1c77900 100644
--- a/Lua/src/base/UMain.pas
+++ b/Lua/src/base/UMain.pas
@@ -118,7 +118,7 @@ var
   PlayersPlay:  integer;
 
   CurrentSong : TSong;
-  Lua : Plua_State;
+  //Lua : Plua_State;
 
 const
   MAX_SONG_SCORE = 10000;     // max. achievable points per song
@@ -228,6 +228,9 @@ begin
     SDL_Init(SDL_INIT_VIDEO or SDL_INIT_TIMER);
     SDL_EnableUnicode(1);
 
+    // create luacore first so other classes can register their events
+    LuaCore := TLuaCore.Create;
+
     USTime := TTime.Create;
     VideoBGTimer := TRelativeTimer.Create;
 
@@ -390,7 +393,7 @@ begin
     end;
 
     // Lua
-    Log.BenchmarkStart(1);
+    {Log.BenchmarkStart(1);
     Lua := luaL_newstate;
     if Lua = nil then
       Log.LogError('Lua init failed','Lua');
@@ -403,7 +406,7 @@ begin
     luaopen_TextGL(Lua);  // TextGL (Lua)
     lua_pop(Lua, 1);      // remove table from stack
     luaopen_Texture(Lua); // Texture (Lua)
-    lua_pop(Lua, 1);      // remove table from stack
+    lua_pop(Lua, 1);      // remove table from stack   }
 
     Log.BenchmarkEnd(1);
     Log.LogBenchmark('Initializing Lua', 1);
@@ -422,13 +425,12 @@ begin
 
     Party := TPartyGame.Create;
 
-    LuaCore := TLuaCore.Create;
-
     LuaCore.RegisterModule('Log', ULuaLog_Lib_f);
     LuaCore.RegisterModule('Gl', ULuaGl_Lib_f);
+    LuaCore.RegisterModule('TextGl', ULuaTextGl_Lib_f);
     LuaCore.RegisterModule('Party', ULuaParty_Lib_f);
 
-    LuaCore.BrowseDir(PluginPath);
+    LuaCore.LoadPlugins;
     LuaCore.DumpPlugins; 
 
 
@@ -454,7 +456,7 @@ begin
     //TTF_Quit();
     SDL_Quit();
 
-    lua_close(Lua);
+    //lua_close(Lua);
 
     if assigned(Log) then
     begin
@@ -487,14 +489,14 @@ begin
     // display
     done := not Display.Draw;
 
-    // FIXME remove this when the Partymode works
+    {// FIXME remove this when the Partymode works
     if FileExists(ScriptPath + 'main.lua') then
     begin
       if 0 <> luaL_dofile(Lua, PAnsiChar(ScriptPath + 'main.lua')) then
       begin
         Log.LogError(lua_tostring(Lua,-1));
       end;
-    end;
+    end;      }
 
     SwapBuffers;
 
diff --git a/Lua/src/base/UParty.pas b/Lua/src/base/UParty.pas
index 0be7cf61..1566e4e8 100644
--- a/Lua/src/base/UParty.pas
+++ b/Lua/src/base/UParty.pas
@@ -153,6 +153,10 @@ type
 
     function StartGame(Rounds: ARounds): Boolean;
 
+    { sets the winner(s) of current round
+      returns true on success }
+    function SetWinner(WinBin: Integer): Boolean;
+
     { increases round counter by 1 and clears all round specific information;
       returns the number of the current round or -1 if last round has already
       been played }
@@ -531,6 +535,18 @@ begin
   end;
 end;
 
+{ sets the winner(s) of current round
+  returns true on success }
+function TPartyGame.SetWinner(WinBin: Integer): Boolean;
+begin
+  if (bPartyStarted) and (CurRound >= 0) and (CurRound <= High(Rounds)) then
+  begin
+    Rounds[CurRound].Winner := WinBin;
+  end
+  else
+    Result := false;
+end;
+
 { increases round counter by 1 and clears all round specific information;
   returns the number of the current round or -1 if last round has already
   been played }
@@ -674,8 +690,11 @@ begin
       if (CallLua(Parent, Functions.AfterSing)) then
       begin // execute default function:
 
-        // display party score screen
-        Display.FadeTo(@ScreenPartyScore);
+        if (bPartyGame) then
+          // display party score screen
+          Display.FadeTo(@ScreenPartyScore)
+        else //display standard score screen
+          Display.FadeTo(@ScreenScore);
       end;
   end;
 end;
diff --git a/Lua/src/lua/UHookableEvent.pas b/Lua/src/lua/UHookableEvent.pas
index d6ec2807..a8422026 100644
--- a/Lua/src/lua/UHookableEvent.pas
+++ b/Lua/src/lua/UHookableEvent.pas
@@ -281,13 +281,4 @@ begin
   Result := 0;

 end;

 

-{ this is a helper in case an evenet owner don't has no use for the results

-  returns number of popped elements }

-function Lua_ClearStack(L: Plua_State): Integer;

-  var I: Integer;

-begin

-  Result := lua_gettop(L);

-  lua_pop(L, Result);

-end;

-

 end.
\ No newline at end of file
diff --git a/Lua/src/lua/ULuaCore.pas b/Lua/src/lua/ULuaCore.pas
index 403709dd..5c6f2463 100644
--- a/Lua/src/lua/ULuaCore.pas
+++ b/Lua/src/lua/ULuaCore.pas
@@ -117,6 +117,8 @@ type
       EventHandles: Array of String; //< Index is Events handle, value is events name. if length(value) is 0 handle is considered unregistred

 

       Plugins: Array of TLuaPlugin;

+

+      eLoadingFinished: THookableEvent;

     protected

       Modules: Array of TLuaModule; //< modules that has been registred, has to be proctected because fucntions of this unit need to get access

 

@@ -125,6 +127,8 @@ type
       constructor Create;

       destructor Destroy;

 

+      procedure LoadPlugins;                         //< calls LoadPlugin w/ Plugindir and LoadingFinished Eventchain

+

       procedure BrowseDir(Dir: WideString);          //< searches for files w/ extension .usdx in the specified dir and tries to load them w/ lua

       procedure LoadPlugin(Filename: WideString);    //< tries to load filename w/ lua and creates the default usdx lua environment for the plugins state

 

@@ -177,7 +181,7 @@ var
   LuaCore: TLuaCore;

 

 implementation

-uses ULog, UPlatform, ULuaUsdx;

+uses ULog, UPlatform, ULuaUsdx, UMain;

 

 constructor TLuaCore.Create;

 begin

@@ -185,6 +189,8 @@ begin
 

   //init EventList w/ nil

   EventList := nil;

+

+  eLoadingFinished := nil;

 end;

 

 destructor TLuaCore.Destroy;

@@ -208,6 +214,18 @@ begin
   inherited;

 end;

 

+{ calls BrowseDir w/ plugin dir and LoadingFinished eventchain }

+procedure TLuaCore.LoadPlugins;

+begin

+  // we have to create event here, because in create it can

+  // not be registred, because LuaCore is no assigned

+  if (not Assigned(eLoadingFinished)) then

+    eLoadingFinished := THookableEvent.Create('Usdx.LoadingFinished');

+

+  BrowseDir(PluginPath);

+  eLoadingFinished.CallHookChain(false);

+end;

+

 { searches for files w/ extension .usdx in the specified

   dir and tries to load them w/ lua }

 procedure TLuaCore.BrowseDir(Dir: WideString);

@@ -564,7 +582,15 @@ begin
     Id := lua_ToInteger(L, lua_upvalueindex(1));

 

     luaL_register(L, PChar('Usdx.' + LuaCore.Modules[Id].Name), @LuaCore.Modules[Id].Functions[0]);

-    

+

+    // set the modules table as global "modulename"

+    // so it can be accessed either by Usdx.modulename.x() or

+    // by modulename.x()

+    lua_setglobal(L, PChar(LuaCore.Modules[Id].Name));

+

+    // no we net to push the table again to return it

+    lua_getglobal(L, PChar(LuaCore.Modules[Id].Name));

+

     Result := 1; //return table

   end

   else

diff --git a/Lua/src/lua/ULuaParty.pas b/Lua/src/lua/ULuaParty.pas
index c102b2ac..c563f902 100644
--- a/Lua/src/lua/ULuaParty.pas
+++ b/Lua/src/lua/ULuaParty.pas
@@ -57,6 +57,11 @@ function ULuaParty_Register(L: Plua_State): Integer; cdecl;
   of current game were played }

 function ULuaParty_GameFinished(L: Plua_State): Integer; cdecl;

 

+{ Party.SetWinner - sets winner of current party round,

+  if no party game is started or party game is finished

+  it will raise an error }

+function ULuaParty_SetWinner(L: Plua_State): Integer; cdecl;

+

 { Party.GetTeams - returns a table with all information and structure as

   in the TPartyGame.Teams array }

 function ULuaParty_GetTeams(L: Plua_State): Integer; cdecl;

@@ -66,47 +71,17 @@ function ULuaParty_GetTeams(L: Plua_State): Integer; cdecl;
 function ULuaParty_SetTeams(L: Plua_State): Integer; cdecl;

 

 const

-  ULuaParty_Lib_f: array [0..3] of lual_reg = (

+  ULuaParty_Lib_f: array [0..4] of lual_reg = (

     (name:'Register'; func:ULuaParty_Register),

     (name:'GameFinished'; func:ULuaParty_GameFinished),

+    (name:'SetWinner'; func:ULuaParty_SetWinner),

     (name:'GetTeams'; func:ULuaParty_GetTeams),

     (name:'SetTeams'; func:ULuaParty_SetTeams)

   );

 

 implementation

-uses ULuaCore, UParty, SysUtils;

-

-{ converts a lua table with a structure like:

-    * = 1 , * = 4 , * = 5

-  to an integer with the value:

-    11001

-  does not pop anything }

-function Lua_ToBinInt(L: PLua_State; idx: Integer): Integer;

-  var

-    I: Integer;

-begin

-  // default: no bits set

-  Result := 0;

-

-  lua_checkstack(L, 3);

+uses ULuaCore, ULuaUtils, UParty, SysUtils;

 

-  if (idx < 0) then

-    dec(idx); // we will push one value before using this

-

-  lua_PushNil(L);

-  while (lua_next(L, idx) <> 0) do

-  begin

-    if (lua_isNumber(L, -1)) then

-    begin //check if we got an integer value from 1 to 32

-      I := lua_toInteger(L, -1);

-      if (I >= 1) and (I <= 32) then

-        Result := Result or 1 shl (I - 1);

-    end;

-

-    // pop value, so key is on top

-    lua_pop(L, 1);

-  end;

-end;

 

 { Party.Register - register party mode at party manager

   arguments: info: table

@@ -196,6 +171,17 @@ begin
   Result := 1;

 end;

 

+{ Party.SetWinner - sets winner of current party round,

+  if no party game is started or party game is finished

+  it will raise an error }

+function ULuaParty_SetWinner(L: Plua_State): Integer; cdecl;

+begin

+  luaL_checktype(L, 1, LUA_TTABLE);

+

+  if (not Party.SetWinner(Lua_ToBinInt(L, 1))) then

+    luaL_error(L, PChar('cann''t set party winner. Is party started and not finished yet?'));

+end;

+

 { Party.GetTeams - returns a table with all information and structure as

   in the TPartyGame.Teams array }

 function ULuaParty_GetTeams(L: Plua_State): Integer; cdecl;

diff --git a/Lua/src/lua/ULuaTextGL.pas b/Lua/src/lua/ULuaTextGL.pas
index 287695f9..1db41b21 100644
--- a/Lua/src/lua/ULuaTextGL.pas
+++ b/Lua/src/lua/ULuaTextGL.pas
@@ -34,45 +34,114 @@ interface
 {$I switches.inc}
 
 uses
-  SysUtils,
   TextGL,
   ULua;
 
-function luaopen_TextGL (L: Plua_State): Integer; cdecl;
+{ TextGl.Pos(X, Y: Float) : sets font position }
+function ULuaTextGL_Pos(L: Plua_State): Integer; cdecl;
+
+{ TextGl.Size(Size: Float) : sets font size }
+function ULuaTextGL_Size(L: Plua_State): Integer; cdecl;
+
+{ TextGl.Style(Style: int) : sets font style (from 0 to 3) }
+function ULuaTextGL_Style(L: Plua_State): Integer; cdecl;
+
+{ TextGl.Italic(isItalic: boolean) : sets if font is italic }
+function ULuaTextGL_Italic(L: Plua_State): Integer; cdecl;
+
+{ TextGl.Width(Text: String) : returns width of Text if printed
+  w/ current settings in pixels }
+function ULuaTextGL_Width(L: Plua_State): Integer; cdecl;
+
+{ TextGl.Print(Text: String) : prints text to screen w/ current
+  settings}
+function ULuaTextGL_Print(L: Plua_State): Integer; cdecl;
+
+const
+  ULuaTextGl_Lib_f: array [0..5] of lual_reg = (
+    (name:'Pos'; func:ULuaTextGl_Pos),
+    (name:'Size'; func:ULuaTextGl_Size),
+    (name:'Style'; func:ULuaTextGl_Style),
+    (name:'Italic'; func:ULuaTextGl_Italic),
+    (name:'Width'; func:ULuaTextGl_Width),
+    (name:'Print'; func:ULuaTextGl_Print)
+  );
 
-function ULuaTextGL_Dummy(L: Plua_State): Integer; cdecl;
 
 implementation
 
-function ULuaTextGL_Dummy(L: Plua_State): Integer; cdecl;
+{ TextGl.Pos(X, Y: Float) : sets font position }
+function ULuaTextGL_Pos(L: Plua_State): Integer; cdecl;
+  var X, Y: Double;
 begin
-  result:=0; // number of results
+  X := luaL_checknumber(L, 1);
+  Y := luaL_checknumber(L, 2);
+
+  SetFontPos(X, Y);
+
+  Result := 0;
 end;
 
-const
-  ULuaTextGL_Lib_f: array [0..1] of lual_reg = (
-   (name:'Print';func:ULuaTextGL_Dummy),
-   (name:nil;func:nil)
-   );
+{ TextGl.Size(Size: Float) : sets font size }
+function ULuaTextGL_Size(L: Plua_State): Integer; cdecl;
+  var Size: Double;
+begin
+  Size := luaL_checknumber(L, 1);
+
+  SetFontSize(Size);
+  
+  Result := 0;
+end;
 
-function luaopen_TextGL (L: Plua_State): Integer; cdecl;
+{ TextGl.Style(Style: int) : sets font style (from 0 to 3) }
+function ULuaTextGL_Style(L: Plua_State): Integer; cdecl;
+  var Style: Integer;
 begin
-    luaL_register(L,'TextGL',@ULuaTextGL_Lib_f[0]);
-    result:=1;
+  Style := luaL_checkinteger(L, 1);
+
+  if (Style >= 0) and (Style <= 3) then
+    SetFontStyle(Style)
+  else
+    luaL_ArgError(L, 1, PChar('number from 0 to 3 expected')); 
+
+  Result := 0;
 end;
-end.
 
-{
-procedure BuildFont;                          // build our bitmap font
-procedure KillFont;                           // delete the font
-function  glTextWidth(const text: string): real; // returns text width
-procedure glPrint(const text: string);        // custom GL "Print" routine
-procedure ResetFont();                        // reset font settings of active font
-procedure SetFontPos(X, Y: real);             // sets X and Y
-procedure SetFontZ(Z: real);                  // sets Z
-procedure SetFontSize(Size: real);
-procedure SetFontStyle(Style: integer);       // sets active font style (normal, bold, etc)
-procedure SetFontItalic(Enable: boolean);     // sets italic type letter (works for all fonts)
-procedure SetFontAspectW(Aspect: real);
-procedure SetFontReflection(Enable:boolean;Spacing: real); // enables/disables text reflection
-}
+{ TextGl.Italic(isItalic: boolean) : sets if font is italic }
+function ULuaTextGL_Italic(L: Plua_State): Integer; cdecl;
+  var isItalic: Boolean;
+begin
+  luaL_checkany(L, 1);
+  isItalic := lua_toBoolean(L, 1);
+
+  SetFontItalic(isItalic);
+  
+  Result := 0;
+end;
+
+{ TextGl.Width(Text: String) : returns width of Text if printed
+  w/ current settings in pixels }
+function ULuaTextGL_Width(L: Plua_State): Integer; cdecl;
+  var Text: String;
+begin
+  Text := luaL_checkstring(L, 1);
+  lua_pop(L, lua_gettop(L));
+
+  lua_PushNumber(L, glTextWidth(Text));
+
+  Result := 1;
+end;
+
+{ TextGl.Print(Text: String) : prints text to screen w/ current
+  settings}
+function ULuaTextGL_Print(L: Plua_State): Integer; cdecl;
+  var Text: String;
+begin
+  Text := luaL_checkstring(L, 1);
+
+  glPrint(Text);
+
+  Result := 0;
+end;
+
+end.
diff --git a/Lua/src/lua/ULuaUtils.pas b/Lua/src/lua/ULuaUtils.pas
new file mode 100644
index 00000000..c8fa934e
--- /dev/null
+++ b/Lua/src/lua/ULuaUtils.pas
@@ -0,0 +1,93 @@
+{* UltraStar Deluxe - Karaoke Game

+ *

+ * UltraStar Deluxe is the legal property of its developers, whose names

+ * are too numerous to list here. Please refer to the COPYRIGHT

+ * file distributed with this source distribution.

+ *

+ * This program is free software; you can redistribute it and/or

+ * modify it under the terms of the GNU General Public License

+ * as published by the Free Software Foundation; either version 2

+ * of the License, or (at your option) any later version.

+ *

+ * This program is distributed in the hope that it will be useful,

+ * but WITHOUT ANY WARRANTY; without even the implied warranty of

+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+ * GNU General Public License for more details.

+ *

+ * You should have received a copy of the GNU General Public License

+ * along with this program; see the file COPYING. If not, write to

+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

+ * Boston, MA 02110-1301, USA.

+ *

+ * $URL: https://ultrastardx.svn.sourceforge.net/svnroot/ultrastardx/branches/experimental/Lua/src/lua/ULuaGl.pas $

+ * $Id: ULuaGl.pas 1555 2009-01-11 18:19:42Z Hawkear $

+ *}

+

+unit ULuaUtils;

+

+interface

+

+{$IFDEF FPC}

+  {$MODE Delphi}

+{$ENDIF}

+

+{$I switches.inc}

+

+uses ULua;

+

+{ converts a lua table with a structure like:

+    * = 1 , * = 4 , * = 5

+  to an integer with the value:

+    0b11001

+  does not pop anything }

+function Lua_ToBinInt(L: PLua_State; idx: Integer): Integer;

+

+{ this is a helper in case an evenet owner don't has no use for the results

+  returns number of popped elements }

+function Lua_ClearStack(L: Plua_State): Integer;

+

+

+implementation

+

+{ converts a lua table with a structure like:

+    * = 1 , * = 4 , * = 5

+  to an integer with the value:

+    0b11001

+  does not pop anything }

+function Lua_ToBinInt(L: PLua_State; idx: Integer): Integer;

+  var

+    I: Integer;

+begin

+  // default: no bits set

+  Result := 0;

+

+  lua_checkstack(L, 3);

+

+  if (idx < 0) then

+    dec(idx); // we will push one value before using this

+

+  lua_PushNil(L);

+  while (lua_next(L, idx) <> 0) do

+  begin

+    if (lua_isNumber(L, -1)) then

+    begin //check if we got an integer value from 1 to 32

+      I := lua_toInteger(L, -1);

+      if (I >= 1) and (I <= 32) then

+        Result := Result or 1 shl (I - 1);

+    end;

+

+    // pop value, so key is on top

+    lua_pop(L, 1);

+  end;

+end;

+

+{ this is a helper in case an evenet owner don't has no use for the results

+  returns number of popped elements }

+function Lua_ClearStack(L: Plua_State): Integer;

+  var I: Integer;

+begin

+  Result := lua_gettop(L);

+  lua_pop(L, Result);

+end;

+

+end.
\ No newline at end of file
diff --git a/Lua/src/menu/UDisplay.pas b/Lua/src/menu/UDisplay.pas
index 1730406f..525b73a9 100644
--- a/Lua/src/menu/UDisplay.pas
+++ b/Lua/src/menu/UDisplay.pas
@@ -40,7 +40,8 @@ uses
   gl,
   glu,
   SysUtils,
-  UMusic;
+  UMusic,
+  UHookableEvent;
 
 type
   TDisplay = class
@@ -61,6 +62,9 @@ type
 
       OSD_LastError : String;
 
+      ePreDraw: THookableEvent;
+      eDraw: THookableEvent;
+
       procedure DrawDebugInformation;
     public
       NextScreen   : PMenu;
@@ -131,6 +135,10 @@ begin
 
   //Set LastError for OSD to No Error
   OSD_LastError := 'No Errors';
+
+  // create events for plugins
+  ePreDraw := THookableEvent.Create('Display.PreDraw');
+  eDraw := THookableEvent.Create('Display.Draw');
 end;
 
 destructor TDisplay.Destroy;
@@ -183,6 +191,7 @@ begin
 
     if (not assigned(NextScreen)) and (not BlackScreen) then
     begin
+      ePreDraw.CallHookChain(false);
       CurrentScreen.Draw;
 
       //popup mod
@@ -197,6 +206,8 @@ begin
         FadeEnabled := True
       else if (Ini.ScreenFade = 0) then
         FadeEnabled := False;
+
+      eDraw.CallHookChain(false);
     end
     else
     begin
@@ -215,8 +226,11 @@ begin
           glPushAttrib(GL_VIEWPORT_BIT);
           glViewPort(0, 0, 512, 512);
 
+
           // draw screen that will be faded
+          ePreDraw.CallHookChain(false);
           CurrentScreen.Draw;
+          eDraw.CallHookChain(false);
 
           // clear OpenGL errors, otherwise fading might be disabled due to some
           // older errors in previous OpenGL calls.
@@ -255,7 +269,11 @@ begin
 
         // blackscreen-hack
         if not BlackScreen then
-          NextScreen.Draw // draw next screen
+        begin
+          ePreDraw.CallHookChain(false);
+          NextScreen.Draw; // draw next screen
+          eDraw.CallHookChain(false);
+        end
         else if ScreenAct = 1 then
         begin
           glClearColor(0, 0, 0 , 0);
diff --git a/Lua/src/ultrastardx.dpr b/Lua/src/ultrastardx.dpr
index cc2f7f0d..dcd0d0c7 100644
--- a/Lua/src/ultrastardx.dpr
+++ b/Lua/src/ultrastardx.dpr
@@ -145,6 +145,7 @@ uses
   //------------------------------
 
   ULua           in 'lib\Lua\ULua.pas',
+  ULuaUtils      in 'lua\ULuaUtils.pas',
   ULuaGl         in 'lua\ULuaGl.pas',
   ULuaLog        in 'lua\ULuaLog.pas',
   ULuaTextGL     in 'lua\ULuaTextGL.pas',